Molding cutter



Patented .lune 7, 1927.

. *HOLDING CUTTER. f -f This inventionA has to do with devices for cutting such elements as molds, beads, etc.,` andthe primaryobgect of the invention is to produce a simple, inexpensive and eflcientv` form'of cutter thatl may be easily usedby a workman to cut molds, beads, etc., very accurately to fit `the places for which .they are intended.v

I In the manufacture of allkindsof doors, i door andwlndow frames, sash, frames of.'

various kinds, and in the building of'various other structures it is necessary to t large numbers of beads or moldings in place." A typical instance is, 4for instance, the cutting and fitting-'of quarter-round org-otherf molds onscreenv doors.. Grdinarily-this' work .has been done by workmen first cutting one end ofl a piece to the proper angle, holdingfthe piece in place against the' door,

marking the,requisiteflength, then removing thepieceto amiter saw `.or ruiter cutter and cutting at the lpreviously made ma'rk.` 'All these-things involve time, unnecessary movements on the part of the workman, and also.

involve inevitably afcertain amount Ofierror.v It ishighly advantageous-that such ymolds be rfitted tightly; my invention provides for such accuracyin cutting that the moldsvalways' fit' tightly, and also' does away with many of the excess movementsfand therefore",

obviates a good deal of lost time.- i

detailed'description, myV cutter involves la small hand operated instrumentthat is held in a certain relation lo the work` while themoldY is held in position; gthe "cutis, then 4 made'without removing the mold `from'the work, and the mold willthen Iaccuratelylv pand tightly fit. Thed'evice'lfhereiirexplain is a typical'and illustrativeembodiment-of' theinvention, and I explain it in detail not' for thepurpose ofi-limiting the invention to' such details, but for the `purpose ofpgiving a "clearV and/'full understanding ofithe in- Q vention itself'throughtheinedium ofgivingf a full descriptionfoffthis?specific and'nowr preferred embodinr'ient.` For 5this purpose I refer" to" the accompar'iying drawings,.in which. i vfFig.' 1 is an elevation showing` the application of mycutter` tothe lworkr'" 'Fig.-2 isan endfview thereof; v Fig. isa-plan ofthe lcutter itself;

. l`Fig. 4 is anend'viewgof the cutter;""

Figi` 5 i'sa side view lofthe cutter;

'i detailed section taken on line A .6-6ofFig.1;and

Fig-:7 is a detailed sec-tion on line of Fig. 5.`r I

lIn* the drawings Iv show a typical screen operations of cutting the mold orbead forl such a door. Ina convenient form, the

601i i door at 10and'1illustrate the cutter in itsV cutter is operated by handles v11 pivoted together at 12 and pivotally connect-ed at 13 and 14 ,to ythetwo relatively movable -hanldies of the cutter. As shownY in the drawings'the lower element 15 is formedwith a lower-flat face lwliich has a gau'gefshou'lder 17 projecting downwardly; and 'when' the cutter is in working' position'thisgauge shoulder'iits into. the corner-fthat the cutting Vend ofthe moldhasto fit into. This position of'gaug'e shoulderf17 is vshown in'V Figfi 6.v Element 15l has a work supporting sur- Y face `18 and anothersu-rface 19 standingat L right angles` toi vsurfacev 18l and against which the Work may be Vbacked up. Surface 19 is substantially in line with'or in theplane lof thebaclr Vsurface of f gauge shoulderit17, asis shown in Fig. 7 :in thiselement 15 Athere is diagonally machined fnotchw'ithy twowalls or surfacesiQO that', fora '415,0 eut,

standxatyQOC" .to each otherrand at 45 to the' back'. surface 19. The'two surfaces j2O meetorhave their apexat a" point Vsomewhat bef Aswillbe understood froml the followinghind. the` back. surface 19, and upward eX? tensions 204`of .these two surfaces are formed Y may extend above the upper edge ofbacking surface V'119;' and the meeting corners ofvthese' i cutters extend clear back y'into' they angle Tor!" apex of-surface 20,y so that the rear edges .of

thel cutters are well behind" lthefb'acl: surfaceback ledges of the cutters fromriding-over?.

Vthe beadjorv mold and-prevent wedgingof anywood between `the back edges of the cut?A 'ters and the surface '19.l L{"llhesetwosurfaces i 20, form,=where they meet themold-supp'orti ingsurfacevlS, cutting edgesjat' whichfthe inol'do'r bead issheared bycutters 22. .f

Y The other relatively'movable elfernentQk of 1100i Y, ofthe mold or bead tha'tis` placedv againstV `surface 19. This arrangement prevents `-the i the device slides on two cylindrical guide posts 26 vwhich are mounted in element 15,

' springs 27 vbeing interposed so thatnorrnally theseveral parts will stand inthe relative positions illustrated in the drawings.l Coin;

pression of handles 41'1-v causes downward movement of element toward element,l5- and causes cutters 22 to move down on what may be termed the work` Supporting table (formed in element to cut the mold or bead. CuttersQQ. areadjustably and removably Vsecured at 29 againstI two". surfaces 28 on element 25,"thesesuifaces'corresponding in relativeV position to surfaces 2O and being directly above them, so that thebackfaces of cutters 22 (the faces of the Vcutters that.

are against 'surfaoeszyare directly in. the

' planes of surface 20: The lower. ends of the 'cutters are made to have diagonaly Cutting.

edges 30 so as to get shearing cuts. onthe mold or bead, and' there diagonalzfcuttmg.

edges are so-arrangechjas will be apparent froman inspectionzofv TEig. 5, thatftheil action is .to push the work back against face 19 rather than Ito push the work awayfrom. that face.

The cutter-sare beveled at 31" on their forward faces v so that cutting. edgesv 30 lie in the planes ofy their Vbaclrfaces, and so planes of-surfacesQO. 'From what has. been said it-will now be apparenthow a mold'L or bead may beicut at that the cuttingedges are accurately in the any predetermined angle lby placing '-the work in the cutter on surface 18 'and1 back against surface '19, and.l compressirfghan- CllS 1l'.

work. ',VVhen the cuttersfreach:theirI stop position' the points. ofv the. cutters. have not'. passedbelow Vthe lower flat-.surfacelG-of:

element 15 andthe .points are thus prevented fromr marring i or injuring any'. work onA which the cutter is placed. Thestop forthe 'at-right langles to eachv other. V'These two Vcuts are a little. separated froineach other tical operation ofithe cutter.v Thetoeof; one cut, yas will 'readily be seen, comes at a point even at what maybe termed the vtoe o frthev cut,- due to thefact that the lcuttersat their back edges extend lslightlybehind surfaces 19; but this isof;noY consequencelin thepraci that corresponds tothe .point markedQObin.

in Fig. 7 audit is directly vunder this point f 20F thattheend on corner. 17?r @f gauge The cutters. move downfA on the work shearing it with Vasmoo'th cut, andi." 'when the cutters come to fa stop, thefcutting edge 30 has. passedcompletely -throughf the shoulder 17 is located. This is clearly shown in Fig.` 7.' Consequently when the tool' is applied as indicated 'inthe drawings, with gauge shoulder 17 in a corner of a door frame, as shown in E ig. 6,anda mold Vor bead is-pl'aced'in'th'e cutter, the cut indicated aty1 in Fig. 6 will he made on a plane that passesdirectly through the end or corner 17h of gauge lshoulder,17;,4 and therefore the cut will be made so that its toe will fit tightly into'. the corner in, which shoulder 17 wa 'placed when the cut wasmade.

lnl using my. tool-the. workman will first y ina-kev a; cut atene, en d of along piece of beading, vsuch as shownV at L10, and the-n. he.l will place that iirstcut end: .L Oa'in the corner of the frame into which it is to lit, and then he will place thetool in its proper, position infthe opposite corner, with shoulder 17in the corner, and then Vhe will place the piece ofbead. or 'mold inthe tool andi then make. his cut." Due to the fact that work support#r ingsurface-y 18 is slightly. above surface 1 6,

whichrests yon the door frame, the piece of molding.willA be in ,a slightlydiago-nal posiy tioni as Shown in thatfiigure, the molding lying flatly. onl surface 18. This,however, isy

not asource of inaccuracy, atleast when cutting moldingsgto ordinary lengths.VV The qcut having been, made, then the cut piece of Amolding indicated at 40 in Fig.' 6 isof just tl'ie'correct length tov fit between the'twouintendedA corners. It is desired in placing such mol'dii'igs. that` they tit fairly tightly; and

this tightnessof fitmay be originally determined by the exact placement oig'gaugek SOY lOO

shoulderg17;v or if itis-desired. to fit' the.

molding alittle more'tightly, this mayI be.

doneby holding.` tha-ended()C ofmoildinf 40 in vits proper corner. andv then, instead o allowing the molding inits slightly diagonal positionl (as shown` in Eig, 2)..to induce a-diagonal or tippedpositionof thejcuttenthe cutter may. vbeniaintaii'aed uprightand the, molding; slightlyhent. and the cut made while the cutter andwork are in these posi.-

tions. This ,will slightlyl increase the length ofgthe out'A piece soy as KtoamalreI itfit more tightlyif desired. B ut kin any case, it will.;

be seen that,".without any'manipulation on the part of the workman calling-for judge. ment,.the.molding mayeasily be cut exactly to the required:length:Y andithefworlnnan has done all this ,without moving away from, the

door o rlotherstructure he is'working on. He vcuts the required;v 'length of molding and then immediatelypfitsit in place. Atthe.

same timethat he has'made lthe cu't Sfhehas also made the otherlcut before referredgtoas shownat35?;in- Fig. 6. This cut 35a' at -the end oftherernaining part ofthemolding length enables the workman immediatelyxto take that V'remaining length, indicated atv L10c 4in Fig. y6, and place yitin position as indicated at 409m Fig. r6 toybecut for-thehnext well as very accurately.-

I claim:

A devicevof the character described coinprising two relatively movable elements, the lower one of which carries upwardly extending guide posts and the upper one of which is'slidable on said guide posts, means connected with the two elements for `moving them toward each other, springs around the guide posts tending to move the elements away from each other, the lower element having a flat under face and having a downwardly projecting gauge shoulder thereon, and said lowerelement having an upwardly facing work supporting surface and a verti- Acal work backing surface above the work supporting surface,` a V-sliaped notch cut into said lower element through its two last mentioned surfaces, said notch having cutter guiding faces that lie at predetermined angles to the work backing surface, an upward extension to said lower element carrying upward extensions ofsaidf cutter guiding faces and also upward extensions ofl said work backingv surface, said' cutter lguiding faces vmeeting alongl a vertical line situated behindthe work backing surfaces; a pair of shearing cutters carriedv by the upper eleinentwith their two outside faces-directly iny the planes of the twocutter guiding faces, the` lower ends of said cutters being formed with diagonalcutting edges in tlieirrouter faces, said diagonal edges being arrangedso that they tend to press the work back against the work backing surface when the cut-ters are urged toward the work carried by the 0 first mentioned element: and the gauge shoulder having an end adapted to be placed inra corner and lying substantially in line with the line where one ofsaid cutter guid- Y ing faces meets the work backing surface..

In witness that I claimthe` foregoing I have hereunto subscribed inyname this 7th day of August, 1925. l

WILLIAM W. HARTMAN. 

